In article <39cde782@news.povray.org> , "Rune" <run### [at] inamecom> 
wrote:

> How should POV-Ray antialiase pixels when the alpha channel is used?
> I think that it currently behave in an undesirable way.
>
> Example:
>
> (A) I render a white torus on a red background with AA on
>     and alpha channel on too.
>
> (B) In a paint program I want to put this background behind
>     my POV-Ray image.
>
> (C) Around my white torus there's a red halo - a leftover
>     from the red background I originally used. I don't like that.
>
> (D) Instead I think POV-Ray should produce images that works
>     this way (like in image D). However, it won't be changed
>     because the developers think it's better as it currently is
>     (like in image C).
>
> Now I've told you my opinion. What do *you* think? Should it be changed or
> not?
>
> Or even better: It could be optional. That should satisfy everyone. (Would
> it affect the speed? I don't know.)

What you are reporting looks like a bug, not a desired effect.  So you
should post it (only with a reference to this image) in povray.bugreports.


    Thorsten


____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

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